layer1: add router namespace subscriber step 22

pkg/router/namespace_subscriber_test.go

@@ -0,0 +1,52 @@
+package router
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/fission/fission/pkg/utils"
+	"github.com/fission/fission/pkg/utils/manager"
+)
+
+type fakeRouterNamespaceAdder struct {
+	lastNamespace string
+	calls         int
+	err           error
+}
+
+func (f *fakeRouterNamespaceAdder) AddNamespace(ctx context.Context, ns string, mgr manager.Interface) error {
+	f.lastNamespace = ns
+	f.calls++
+	return f.err
+}
+
+func TestNewNamespaceSubscriberAddAndResync(t *testing.T) {
+	adder := &fakeRouterNamespaceAdder{}
+	subscriber := NewNamespaceSubscriber(adder, nil)
+	record := utils.NamespaceRecord{Name: "tenant-router-a"}
+
+	if subscriber.Name() != "router" {
+		t.Fatalf("expected router subscriber name")
+	}
+	if err := subscriber.OnNamespaceAdd(context.Background(), record); err != nil {
+		t.Fatalf("expected add to succeed: %v", err)
+	}
+	if err := subscriber.OnNamespaceResync(context.Background(), record); err != nil {
+		t.Fatalf("expected resync to succeed: %v", err)
+	}
+	if adder.calls != 2 {
+		t.Fatalf("expected adder to be called for add and resync")
+	}
+	if adder.lastNamespace != "tenant-router-a" {
+		t.Fatalf("expected namespace to be forwarded")
+	}
+}
+
+func TestRegisterRouterNamespacePropagatesError(t *testing.T) {
+	adder := &fakeRouterNamespaceAdder{err: errors.New("add failed")}
+	err := registerRouterNamespace(context.Background(), "tenant-router-a", adder, nil)
+	if err == nil || err.Error() != "add failed" {
+		t.Fatalf("expected router add error to be propagated, got %v", err)
+	}
+}